Is this over 3g? I had this problem a while back and determined that my provider (rogers) charges $10/month to allow vpn access. Something's about port blocking (but not tcp or udp ports). My networking knowledge is lacking however.

for each in /proc/sys/net/ipv4/conf/*do echo 0 > $each/accept_redirects echo 0 > $each/send_redirectsdoneI was looking to see if there were any tickets associated with the VPN and found that there was a change that Foxi352 did that should have addressed this:http://svn.linuxmce.org/trac.cgi/changeset/24656